— | Scientific Intelligence. 
“The rc a that may be drawn from this general survey of 
the phenomen 
1. That shaink. are 213 species common to the uppermost part of the 
a Lias and the Oolite. The break is by no means complete. 
2. That progressively, from the lowest to the highest Oolitic forma- 
tions, large percenta ages of species pass upward without any approach to 
a total break either in the whole or in individual Groups, excepting in the 
instance of the Cephalopoda of the Inferior and the oli 
3. That species often disappear from an jnctadbadintie formation to re- 
appear in a higher one, and the principle of migration and return is thus 
pea 
yan ae each s cha etorized its own fossils, disappear, 
tone saunas of Cheltenham _ cept the 1a8, 
anparenty as rap cag as if it formed i i late: Sue 
i overlapped the Fuller's Earth, passes across the Inferior Oolite, a0 
turn seems to lie on the U per Lias with a ee as perfect as 
if 1 no formation anywhere in the nei borhood came between them. In 
sands, ban -plants, and beds of coal, occur in such a manner as to leave 
no doubt of the presence of terrestrial surfaces on which the plants grew) 
and all these phenomena lead to the conclusion that various considerable 
oscillations of level took place in the British area during the deposition 
of the strata both of the Inferior Oolite and of the formations that im- 
rock are both absent, sad the Oxford clay was pointed out to me » by Mr. 
Howell, — directly and ggoonste quite comformably on _ great 
ite. fragmentary character of the Portland rocks is ¢ 
all. 
eae ie probable that the Seer of level that these phenomeua indi- 
ace msl be intima — — with the loss of old, and the appear 
— ance W, species in ; for it is certain inthat ee conformity, 
case of digas Great Oo Oolite lying on the Upper Lias, is often 4e 
is in pertes-p roof of direct aco and it 1s 
